Forma BP farming locations?

[Zahnrad]

Simple as the title says. The old place used to be T3 void but since that's been changed what are some good alternative methods? I can't be bothered running even more relics.

[TheScytale]

You could try ODS, though I don't remember on which rotation they drop. The Moon is good too, since there's melody puzzle tile that guarantees an orokin container upon completion, which has a chance for a built forma.

There's also Earth Sabotage but it's as effective as farming legendary cores from sorties.

[(PSN)Regiampiero]

ODS can be good at times, and if you need mutagen samples still you'll know two birds with one stone. 

[SneakyBeakyIvarr]

There seems to be a decent chance of getting Forma BPs in rotation C of ODS. Dare I say it could be roughly 50%. Whether or not you'd want to go so long for only a chance at a single BP is up to you though.

I'm not entirely sure of other good locations other than relics. I haven't been specifically farming them but I've been getting most of mine either from relics or ODS

[Demogarose]

Here's a list of currently non-vaulted Relics that drop Forma BP as a Common Drop: 

• Lith S4
• Meso D1
• Meso V3
• Neo A1
• Axi A2
• Axi N1
• Axi N3
• Axi V5

[(XBOX)R3d P01nt]

ODD can also drop forma as a Rot C reward.

[(PSN)maso_sage-mode]

meso D1 has 2x forma in its drop table :)